<?php
/**
 * Copyright since 2007 PrestaShop SA and Contributors
 * PrestaShop is an International Registered Trademark & Property of PrestaShop SA
 *
 * NOTICE OF LICENSE
 *
 * This source file is subject to the Open Software License (OSL 3.0)
 * that is bundled with this package in the file LICENSE.md.
 * It is also available through the world-wide-web at this URL:
 * https://opensource.org/licenses/OSL-3.0
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@prestashop.com so we can send you a copy immediately.
 *
 * DISCLAIMER
 *
 * Do not edit or add to this file if you wish to upgrade PrestaShop to newer
 * versions in the future. If you wish to customize PrestaShop for your
 * needs please refer to https://devdocs.prestashop.com/ for more information.
 *
 * @author    PrestaShop SA and Contributors <contact@prestashop.com>
 * @copyright Since 2007 PrestaShop SA and Contributors
 * @license   https://opensource.org/licenses/OSL-3.0 Open Software License (OSL 3.0)
 */

namespace PrestaShopBundle\Twig\Extension;

use Symfony\Component\Form\FormView;
use Twig\Extension\AbstractExtension;
use Twig\TwigFunction;

/**
 * This function allows updating a form vars from the twig, the new vars are merged with the existing ones.
 * Used in ToggleChildrenChoiceType to force invalid state on the radio children.
 *
 * Example: {{ update_form_vars(form, {valid: false}) }}
 */
class UpdateFormVarsExtension extends AbstractExtension
{
    public function getFunctions(): array
    {
        return [
            new TwigFunction(
                'update_form_vars',
                [$this, 'updateFormVars']
            ),
        ];
    }

    public function updateFormVars(FormView $formView, array $newVars): void
    {
        $formView->vars = array_merge($formView->vars, $newVars);
    }
}
